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321 lines
12 KiB
EmacsLisp
321 lines
12 KiB
EmacsLisp
;;; ob-exp.el --- Exportation of org-babel source blocks
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;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
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;; Authors: Eric Schulte
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;; Dan Davison
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'ob)
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(require 'org-exp-blocks)
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(eval-when-compile
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(require 'cl))
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(defvar obe-marker nil)
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(defvar org-current-export-file)
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(defvar org-babel-lob-one-liner-regexp)
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(defvar org-babel-ref-split-regexp)
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(declare-function org-babel-lob-get-info "ob-lob" ())
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(declare-function org-babel-eval-wipe-error-buffer "ob-eval" ())
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(add-to-list 'org-export-interblocks '(src org-babel-exp-non-block-elements))
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(org-export-blocks-add-block '(src org-babel-exp-src-block nil))
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(defcustom org-export-babel-evaluate t
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"Switch controlling code evaluation during export.
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When set to nil no code will be evaluated as part of the export
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process."
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:group 'org-babel
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:version "24.1"
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:type 'boolean)
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(put 'org-export-babel-evaluate 'safe-local-variable (lambda (x) (eq x nil)))
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(defun org-babel-exp-get-export-buffer ()
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"Return the current export buffer if possible."
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(cond
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((bufferp org-current-export-file) org-current-export-file)
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(org-current-export-file (get-file-buffer org-current-export-file))
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('otherwise
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(error "Requested export buffer when `org-current-export-file' is nil"))))
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(defmacro org-babel-exp-in-export-file (lang &rest body)
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(declare (indent 1))
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`(let* ((lang-headers (intern (concat "org-babel-default-header-args:" ,lang)))
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(heading (nth 4 (ignore-errors (org-heading-components))))
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(export-buffer (current-buffer))
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(original-buffer (org-babel-exp-get-export-buffer)) results)
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(when original-buffer
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;; resolve parameters in the original file so that
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;; headline and file-wide parameters are included, attempt
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;; to go to the same heading in the original file
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(set-buffer original-buffer)
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(save-restriction
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(when heading
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(condition-case nil
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(let ((org-link-search-inhibit-query t))
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(org-link-search heading))
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(error (when heading
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(goto-char (point-min))
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(re-search-forward (regexp-quote heading) nil t)))))
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(setq results ,@body))
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(set-buffer export-buffer)
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results)))
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(def-edebug-spec org-babel-exp-in-export-file (form body))
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(defun org-babel-exp-src-block (body &rest headers)
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"Process source block for export.
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Depending on the 'export' headers argument in replace the source
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code block with...
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both ---- display the code and the results
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code ---- the default, display the code inside the block but do
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not process
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results - just like none only the block is run on export ensuring
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that it's results are present in the org-mode buffer
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none ----- do not display either code or results upon export"
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(interactive)
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(unless noninteractive (message "org-babel-exp processing..."))
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(save-excursion
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(goto-char (match-beginning 0))
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(let* ((info (org-babel-get-src-block-info 'light))
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(lang (nth 0 info))
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(raw-params (nth 2 info)) hash)
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;; bail if we couldn't get any info from the block
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(when info
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;; if we're actually going to need the parameters
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(when (member (cdr (assoc :exports (nth 2 info))) '("both" "results"))
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(org-babel-exp-in-export-file lang
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(setf (nth 2 info)
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(org-babel-process-params
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(org-babel-merge-params
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org-babel-default-header-args
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(org-babel-params-from-properties lang)
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(if (boundp lang-headers) (eval lang-headers) nil)
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raw-params))))
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(setf hash (org-babel-sha1-hash info)))
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(org-babel-exp-do-export info 'block hash)))))
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(defcustom org-babel-exp-call-line-template
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""
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"Template used to export call lines.
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This template may be customized to include the call line name
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with any export markup. The template is filled out using
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`org-fill-template', and the following %keys may be used.
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line --- call line
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An example value would be \"\\n: call: %line\" to export the call line
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wrapped in a verbatim environment.
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Note: the results are inserted separately after the contents of
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this template."
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:group 'org-babel
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:type 'string)
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(defvar org-babel-default-lob-header-args)
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(defun org-babel-exp-non-block-elements (start end)
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"Process inline source and call lines between START and END for export."
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(interactive)
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(save-excursion
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(goto-char start)
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(unless (markerp end)
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(let ((m (make-marker)))
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(set-marker m end (current-buffer))
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(setq end m)))
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(let ((rx (concat "\\(" org-babel-inline-src-block-regexp
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"\\|" org-babel-lob-one-liner-regexp "\\)")))
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(while (and (< (point) (marker-position end))
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(re-search-forward rx end t))
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(if (save-excursion
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(goto-char (match-beginning 0))
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(looking-at org-babel-inline-src-block-regexp))
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(progn
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(forward-char 1)
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(let* ((info (save-match-data
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(org-babel-parse-inline-src-block-match)))
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(params (nth 2 info)))
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(save-match-data
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(goto-char (match-beginning 2))
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(unless (org-babel-in-example-or-verbatim)
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;; expand noweb references in the original file
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(setf (nth 1 info)
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(if (and (cdr (assoc :noweb params))
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(string= "yes" (cdr (assoc :noweb params))))
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(org-babel-expand-noweb-references
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info (org-babel-exp-get-export-buffer))
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(nth 1 info)))
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(let ((code-replacement (save-match-data
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(org-babel-exp-do-export
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info 'inline))))
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(if code-replacement
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(progn (replace-match code-replacement nil nil nil 1)
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(delete-char 1))
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(org-babel-examplize-region (match-beginning 1)
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(match-end 1))
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(forward-char 2)))))))
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(unless (org-babel-in-example-or-verbatim)
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(let* ((lob-info (org-babel-lob-get-info))
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(inlinep (match-string 11))
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(inline-start (match-end 11))
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(inline-end (match-end 0))
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(results (save-match-data
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(org-babel-exp-do-export
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(list "emacs-lisp" "results"
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(org-babel-merge-params
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org-babel-default-header-args
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org-babel-default-lob-header-args
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(org-babel-params-from-properties)
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(org-babel-parse-header-arguments
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(org-babel-clean-text-properties
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(concat ":var results="
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(mapconcat #'identity
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(butlast lob-info)
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" ")))))
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"" nil (car (last lob-info)))
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'lob)))
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(rep (org-fill-template
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org-babel-exp-call-line-template
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`(("line" . ,(nth 0 lob-info))))))
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(if inlinep
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(save-excursion
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(goto-char inline-start)
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(delete-region inline-start inline-end)
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(insert rep))
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(replace-match rep t t)))))))))
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(defun org-babel-in-example-or-verbatim ()
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"Return true if point is in example or verbatim code.
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Example and verbatim code include escaped portions of
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an org-mode buffer code that should be treated as normal
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org-mode text."
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(or (save-match-data
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(save-excursion
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(goto-char (point-at-bol))
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(looking-at "[ \t]*:[ \t]")))
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(org-in-verbatim-emphasis)
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(org-in-block-p org-list-forbidden-blocks)
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(org-between-regexps-p "^[ \t]*#\\+begin_src" "^[ \t]*#\\+end_src")))
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(defun org-babel-exp-do-export (info type &optional hash)
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"Return a string with the exported content of a code block.
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The function respects the value of the :exports header argument."
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(flet ((silently () (let ((session (cdr (assoc :session (nth 2 info)))))
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(when (not (and session (equal "none" session)))
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(org-babel-exp-results info type 'silent))))
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(clean () (unless (eq type 'inline) (org-babel-remove-result info))))
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(case (intern (or (cdr (assoc :exports (nth 2 info))) "code"))
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('none (silently) (clean) "")
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('code (silently) (clean) (org-babel-exp-code info))
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('results (org-babel-exp-results info type nil hash) "")
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('both (org-babel-exp-results info type nil hash)
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(org-babel-exp-code info)))))
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(defcustom org-babel-exp-code-template
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"#+BEGIN_SRC %lang%flags\n%body\n#+END_SRC"
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"Template used to export the body of code blocks.
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This template may be customized to include additional information
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such as the code block name, or the values of particular header
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arguments. The template is filled out using `org-fill-template',
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and the following %keys may be used.
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lang ------ the language of the code block
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name ------ the name of the code block
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body ------ the body of the code block
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flags ----- the flags passed to the code block
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In addition to the keys mentioned above, every header argument
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defined for the code block may be used as a key and will be
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replaced with its value."
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:group 'org-babel
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:type 'string)
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(defun org-babel-exp-code (info)
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"Return the original code block formatted for export."
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(setf (nth 1 info)
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(if (string= "strip-export" (cdr (assoc :noweb (nth 2 info))))
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(replace-regexp-in-string
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(org-babel-noweb-wrap) "" (nth 1 info))
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(if (org-babel-noweb-p (nth 2 info) :export)
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(org-babel-expand-noweb-references
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info (org-babel-exp-get-export-buffer))
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(nth 1 info))))
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(org-fill-template
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org-babel-exp-code-template
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`(("lang" . ,(nth 0 info))
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("body" . ,(if (string= (nth 0 info) "org")
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(replace-regexp-in-string "^" "," (nth 1 info))
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(nth 1 info)))
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,@(mapcar (lambda (pair)
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(cons (substring (symbol-name (car pair)) 1)
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(format "%S" (cdr pair))))
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(nth 2 info))
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("flags" . ,((lambda (f) (when f (concat " " f))) (nth 3 info)))
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("name" . ,(or (nth 4 info) "")))))
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(defun org-babel-exp-results (info type &optional silent hash)
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"Evaluate and return the results of the current code block for export.
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Results are prepared in a manner suitable for export by org-mode.
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This function is called by `org-babel-exp-do-export'. The code
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block will be evaluated. Optional argument SILENT can be used to
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inhibit insertion of results into the buffer."
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(when (and org-export-babel-evaluate
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(not (and hash (equal hash (org-babel-current-result-hash)))))
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(let ((lang (nth 0 info))
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(body (if (org-babel-noweb-p (nth 2 info) :eval)
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(org-babel-expand-noweb-references
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info (org-babel-exp-get-export-buffer))
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(nth 1 info)))
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(info (copy-sequence info)))
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;; skip code blocks which we can't evaluate
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(when (fboundp (intern (concat "org-babel-execute:" lang)))
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(org-babel-eval-wipe-error-buffer)
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(prog1 nil
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(setf (nth 1 info) body)
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(setf (nth 2 info)
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(org-babel-exp-in-export-file lang
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(org-babel-process-params
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(org-babel-merge-params
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(nth 2 info)
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`((:results . ,(if silent "silent" "replace")))))))
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(cond
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((equal type 'block)
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(org-babel-execute-src-block nil info))
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((equal type 'inline)
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;; position the point on the inline source block allowing
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;; `org-babel-insert-result' to check that the block is
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;; inline
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(re-search-backward "[ \f\t\n\r\v]" nil t)
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(re-search-forward org-babel-inline-src-block-regexp nil t)
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(re-search-backward "src_" nil t)
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(org-babel-execute-src-block nil info))
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((equal type 'lob)
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(save-excursion
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(re-search-backward org-babel-lob-one-liner-regexp nil t)
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(org-babel-execute-src-block nil info)))))))))
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(provide 'ob-exp)
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;;; ob-exp.el ends here
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